Re: [Qemu-devel] LLVM builds on Lion (Xcode 4.2.1)?

[Rui Carmo]

On Jan 11, 2012, at 19:24 , Peter Maydell wrote:

 This is still waiting for somebody to get round to doing a basic
 noddy FPU-intensive benchmark of (eg) an ARM target on a Linux
 host to find out whether int16_t vs int_fast16_t makes any
 difference at all to performance. (My suspicion is 'no'.)

Quite so - I've since exchanged a couple of messages with Andreas and 
ascertained that. 

But QEMU not running properly when compiled with LLVM is the real problem here, 
since that means people won't be able to build it unless they have an outdated 
compiler around (fresh installs of Xcode don't bundle normal gcc anymore).

I'm starting to think I'm the only person trying to build it with a current Mac 
toolchain...

R.

[Qemu-devel] LLVM builds on Lion (Xcode 4.2.1)?

[Rui Carmo]

Hello, 

I've been trying to get a working build of QEMU 1.0 (or HEAD) that would build 
or run on Mac OS X Lion without segfaulting or spinlocking, and so far the only 
way I've been able to build it _and_ run it is by using gcc-4.2 instead of 
LLVM. Clang doesn't work either (it doesn't support global register variables).

I was wondering who might be looking into that, since I couldn't figure out 
where this kind of issue would be classified in the MAINTAINERS file I've only 
found Andreas (hi!) listed where it concerns Cocoa, but this is not a Cocoa 
issue.

For the record, the way I got it to build was patching fpu/softfloat.h (see 
below, I think this has been submitted as a formal patch by someone else, but 
can't find it either) and setting --cc=gcc-4.2 --host-cc=gcc-4.2.

The issue with that is that plain GCC isn't bundled with Xcode anymore (even 
though I have it on all the machines I tried this, it was apparently removed 
around Xcode 4.1 or thereabouts and my upgrades preserved it), so I'd like to 
get in touch with someone that might be able to address the LLVM issue.

Regards,

R.

http://the.taoofmac.com

--

diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index 07c2929..229d834 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -57,7 +57,7 @@ typedef uint8_t flag;
 typedef uint8_t uint8;
 typedef int8_t int8;
 #ifndef _AIX
-typedef int uint16;
+typedef uint16_t uint16;
-typedef int int16;
+typedef int16_t int16;
 #endif
 typedef unsigned int uint32;

(remember, this is not a formal patch)